APA (7th ed.) Citation

Kline, S., & Wummer, A. (2012). Horrible Harry and the secret treasure. Puffin Books.

Chicago Style (17th ed.) Citation

Kline, Suzy, and Amy Wummer. Horrible Harry and the Secret Treasure. New York: Puffin Books, 2012.

MLA (8th ed.) Citation

Kline, Suzy, and Amy Wummer. Horrible Harry and the Secret Treasure. Puffin Books, 2012.

Warning: These citations may not always be 100% accurate.